WO1998011362A2 - Dispositif a ressort pour le positionnement, dans un boitier, d'un appareil sensible aux vibrations et aux chocs fixe sur un support - Google Patents

Dispositif a ressort pour le positionnement, dans un boitier, d'un appareil sensible aux vibrations et aux chocs fixe sur un support Download PDF

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Publication number
WO1998011362A2
WO1998011362A2 PCT/DE1997/001917 DE9701917W WO9811362A2 WO 1998011362 A2 WO1998011362 A2 WO 1998011362A2 DE 9701917 W DE9701917 W DE 9701917W WO 9811362 A2 WO9811362 A2 WO 9811362A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
springs
carrier plate
spring
carrier
Prior art date
Application number
PCT/DE1997/001917
Other languages
German (de)
English (en)
Other versions
WO1998011362A3 (fr
Inventor
Volker Becker
Ingo Hermanns
Frank Koertje
Thomas Westendorf
Holger Zimmermann
Wilfried Repper
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to DE59703736T priority Critical patent/DE59703736D1/de
Priority to JP10513128A priority patent/JP2001500232A/ja
Priority to EP97942771A priority patent/EP0923684B1/fr
Priority to US09/254,444 priority patent/US6371434B1/en
Publication of WO1998011362A2 publication Critical patent/WO1998011362A2/fr
Publication of WO1998011362A3 publication Critical patent/WO1998011362A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds

Definitions

  • the invention relates to a spring arrangement according to the preamble of claim 1.
  • a vibration or shock sensitive device such as a turntable, a CD disc drive (Compact Disc Player), a CD changer (CD changer) or a floppy disk or hard disk drive to attach to a carrier part and to store the carrier part vibration-damped in a housing via spiral spring elements.
  • Low-vibration and low-impact fastenings of CD drives are required in particular in motor vehicles for trouble-free operation.
  • the device is suspended elastically from the device housing permanently installed in the motor vehicle, the support part being connected to the housing via a plurality of spiral spring elements, which are provided either as tension springs or as compression springs.
  • Fig. La shows the known spring arrangement with tension springs and Fig. Lb with compression springs.
  • Fig. La is a plate-shaped carrier part 2, on the top of which there is, for example, a CD drive 1, over a total of four Spiral springs (10, 11), of which only two are shown, are attached to the top of a cuboid housing 3.
  • the arrangement ensures that an excitation acting on the housing 3 only leads to a greatly weakened acceleration of the drive 1.
  • resonance points are formed which, with a low excitation frequency, are associated with an undesirable, strong vibration of the device 1, as a result of which the device 1 strikes the housing 3.
  • the carrier plate suspended in FIG. 1 a on the springs 10, 11 must be deflected by its weight so far that it is located approximately in the middle of the free oscillating space provided for this purpose, the height of which in FIG. This can be achieved by reducing the spring stiffness, which, however, should be avoided according to equation (1) because of the associated undesired reduction in the natural frequency.
  • the spring arrangement according to FIGS. 1 a and 1b also have the disadvantage that they can only be used in cases in which the spring is loaded axially, that is to say in the direction of the spring axis. With a radial force, however, the springs are more resilient. The springs are hardly stretched, but essentially only pivoted or bent over.
  • CD drives in car radios should often be installed at an angle in the corresponding consoles. If, for example, the drive housing is attached to the roof structure of a bus, a certain angle of inclination is desirable in order to facilitate the insertion of the CD's. In such cases, the prior art provides for the support part 2 to be fastened to the housing 3 with an additional spring 19 which is matched to the angle of inclination. It is also disadvantageous here that the drive cannot be installed in the motor vehicle in any position other than the predetermined position. For this reason, some devices have a changeover mechanism with which, for example, a CD changer can be adapted to the respective installation position within certain limits. This known prior art is shown in FIGS. 7a and 7b.
  • FIG. 7a shows the device with its housing 3 initially in a horizontal installation position.
  • the CD changer not shown, is fastened to a carrier part 2 which is suspended from two disks 40 via two springs 10 and 11, so that the carrier part 2 is located approximately in the middle of the free oscillating space provided for this purpose.
  • the disks 40 are each rotatably fastened to the side walls of the device housing 3 with an axis 41.
  • the springs 10 and 11 are in position A of FIG. 7b.
  • the two disks 40 on the actuating means 42 are rotated in the opposite direction by 90 degrees until the springs 10 and 11 in Fig. 7b in position B, and then locked.
  • the weight of the carrier part 2 with the device arranged thereon is now compensated again by the tension force of the springs 10 and 11, so that the carrier part can vibrate freely in the housing even when installed vertically. Any one too
  • the spring arrangement according to the invention with the characterizing feature of the main claim has the advantage that the rigidity of the individual springs is increased and the natural frequency of the system can be increased. This is achieved by clamping the carrier part in a predetermined position in the housing. A clamping force component acting in a certain direction is always counteracted by a clamping force component in the opposite direction. In this way it is prevented that when using tension or compression springs with great stiffness, the support part is pulled or pressed too far out of the center of the free oscillation space provided by the springs. At the same time, it is achieved that the support part can be installed in different positions in a motor vehicle without the need to adapt the spring arrangement or to change over.
  • the position of the carrier part relative to the housing advantageously changes only slightly in the case of different installation positions, as a result of which trouble-free functioning of the device is ensured regardless of the installation positions in the event of vibrations or impacts.
  • This is essentially achieved in that the springs are not only pivoted or bent when the housing is inclined or rotated, as is the case in the prior art shown in FIG. 2a, but in that in the spring arrangement according to the invention by the clamping - tion of the support part in the housing a deflection of the support part in any direction is always associated with an expansion of the springs. Corresponding restoring forces therefore always counteract the deflection.
  • the spring arrangement is advantageously designed such that the carrier part is arranged approximately in the middle of the free oscillating space. An impact on the housing with larger vibration amplitudes is avoided in this way.
  • the carrier part is furthermore advantageously designed as a flat, rectangular carrier plate.
  • the rectangular carrier plate can advantageously be clamped in a cuboid housing by means of springs provided in the corner regions.
  • the carrier plate is connected to the housing via tension springs attached to the longitudinal sides and oriented approximately parallel to the carrier plate, an arrangement with three springs arranged in the plane of the carrier plate is sufficient.
  • the vibration-sensitive device is attached to a rectangular carrier part.
  • the cuboid carrier part is advantageously clamped between two opposite side walls of the housing by means of two frustoconical springs.
  • the first and last turns of the frustoconical spring do not participate in the suspension and are advantageously firmly connected to the side walls in a connection area lying flat on the side walls.
  • the frustoconical springs enable the support part to be stored in the housing in a particularly space-saving and inexpensive manner.
  • La shows a spring arrangement according to the prior art with a carrier part suspended from tension springs
  • Fig. Lb shows a second spring arrangement according to the prior art, the carrier part being placed on compression springs
  • Fig. 2a shows the spring arrangement from Fig. La when the device housing is tilted
  • Fig. 2b shows the spring arrangement from Fig. 2a with a tilt angle additional spring
  • FIG. 3 shows a first exemplary embodiment of the spring arrangement according to the invention for a CD drive
  • FIG. 4a shows a second exemplary embodiment with springs pointing obliquely away from the carrier plate
  • FIG. 4b shows a force diagram for the exemplary embodiment shown in FIG. 4a
  • FIG. 4c shows a third exemplary embodiment with a leg formed on the carrier plate
  • FIG. 5 shows an exemplary embodiment of the spring arrangement according to the invention with four springs
  • FIG. 6 shows a further exemplary embodiment with three springs
  • FIG. 7a shows a schematic cross section through a CD changer according to the prior art suspended on two springs
  • FIG. 7b shows a side view of FIG. 7a
  • FIG. 8a shows a schematic cross section through an embodiment of the spring arrangement for a CD changer according to the invention
  • FIG. 8b shows a side view of FIG. 8a.
  • the vibration or shock sensitive device 1 in the embodiment shown here is a CD drive.
  • CD drive 1 is located on the top 25 of a rectangular carrier plate 2.
  • the carrier plate 2 is fastened to the top 27 of a cuboid housing 3 with four spiral spring elements, only two of which, namely the springs 10 and 11, shown in FIG. 3.
  • the housing 3 is shown here in a horizontal installation position.
  • Inexpensive tension springs are provided as spiral spring elements, which consist of a helically wound wire and whose ends are designed in the form of eyelets. The tension springs permit simple installation and removal of the carrier plate 2.
  • the eyes of the tension springs are placed in corresponding hooks, which are provided in the corner regions of the rectangular carrier plate 2 on the top side 25 not covered by the drive 1, and in hooks opposite them on the Top 27 of the housing hooked in.
  • the underside 26 of the carrier plate 2 is connected in the same way to the underside of the housing 28 via four further tension springs, of which only the springs 12 and 13 are shown in FIG. 3.
  • the length of the tension springs is dimensioned such that all tension springs attached to the housing 3 must be stretched when hooking into the hooks arranged on the carrier part 2. After all eight springs have been fastened, the carrier part 2 is clamped in the housing 3.
  • the tensile force of the spring 10 acting perpendicularly on the carrier plate 2 counteracts the tensile force of the spring 12, the tensile force of the spring 11 counteracts the tensile force of the spring 13, etc. Since the stiffness is selected such that the springs 10, 11 pull the carrier plate to the top of the housing 27 with the same force with which the opposite springs 12, 13 provided on the bottom 26 pull the carrier plate 2 to the underside 28 of the housing, the rigidity of the springs and thus the overall rigidity of the system capable of vibration can be increased, without the carrier plate being displaced from the center of the oscillating space. This advantageously shifts the natural frequency of the overall system towards higher frequencies.
  • the carrier plate 2 can in addition to the spring elements in addition Fig. 3 vibration damper, not shown, may be connected to the housing 3.
  • the weight of the carrier plate 2 and the device 1 with great spring stiffness leads only to a slight expansion of the upper springs 10, 11 and a slight compression of the lower springs 12, 13.
  • the distance of the carrier plate 2 from the housing top 27 is therefore in that The exemplary embodiment shown here is somewhat larger than the distance to the underside 28 of the housing.
  • the carrier plate 2 is deflected parallel to the housing underside 28 by a component of its weight.
  • the deflecting weight acts as a radial force on the springs 10, 11, 12, 13.
  • the spring 12 prevents the spring 10 from merely pivoting, the spring 13 from merely pivoting the spring 11, etc. Since the carrier part 2 is clamped in the middle of the oscillating space, all eight springs have to be tilted of the housing 3 and a lateral deflection of the carrier part 2 are stretched.
  • FIG. 4a A further development of the exemplary embodiment shown in FIG. 3 is shown in FIG. 4a.
  • the eight tension springs of which only the four springs 10, 11, 12, 13 facing the viewer are shown, protrude obliquely outwards from the top 25 and the bottom 26 when the device 3 is installed horizontally.
  • the ends of the tension springs that are not connected to the corner regions of the rectangular support plate 2 are fastened in the corresponding eight corners of the cuboid housing 3.
  • FIG. 5 which, however, only shows four springs.
  • fastening elements in the housing and to fasten some springs to the fastening elements and other springs to the housing walls The only thing that matters is the inclination of the
  • FIG. 4b shows a simplified force diagram for the exemplary embodiment shown in FIG. 4a.
  • the clamping forces F 1 , F 2 , F 3 and F act on the carrier plate 2.
  • Each of these clamping forces, for example the clamping force F x can be broken down into a horizontal component F-, 'and a vertical component F x '', which counteracts a clamping force component acting in the opposite direction of another spring.
  • component Fj is counteracted by component F 4 'of spring 12 and component F ⁇ ''by component F 2 ''of spring 11. Since all the acting forces compensate, carrier part 2 is clamped in the center of the oscillation chamber.
  • the compared to the Spring forces of relatively low weight of the carrier plate 2 only lead to a weak deflection of the carrier plate in the direction of the housing underside 28.
  • the advantage of this embodiment over the example shown in FIG. 3 is in particular that the eight springs are not only in the horizontal direction but are also biased in the vertical direction. With an inclined installation or even a vertical installation of the housing 3, the inclined springs are therefore deflected more in the axial direction than in the example shown in FIG. 3, which in turn is associated with stronger restoring forces. Regardless of the installation position, correspondingly large restoring forces counteract a deflection of the carrier part 2 in any direction in the embodiment shown in FIG. 4a.
  • the carrier part 2 here consists of a rectangular plate 2, on the long side 22 of which a leg 20 projecting perpendicularly from the underside 26 is formed.
  • the carrier part 2 is clamped in the housing 3 with eight springs, only the springs 10, 11, 12 and 13 of which are shown in FIG. 4c.
  • the embodiment differs from the example shown in Fig. 4a in that the spring 10 is not attached to the top 25 of the carrier plate, but to the end 29 of the leg 20 protruding toward the bottom 28 of the housing and the spring 12 to the leg 20 and support plate 2 formed edge 22 so that the springs 10 and 11 protrude above the top 25 of the support part 2 and the springs 12 and 13 protrude in the opposite direction over the bottom 26.
  • FIG. 5 shows a further development of the exemplary embodiment shown in FIG. 4a, in which the carrier part 2 is only clamped in the housing 3 via four tension springs 10, 13, 14, 15.
  • the support plate 2 springs 10 and 15 are attached to the support plate.
  • the springs 10, 15 protrude obliquely from the upper side 25 and are connected at their other ends to the housing 3 at two corners diagonally opposite one another on the upper side 27 of the housing 3.
  • the other two corner regions of the carrier plate 2 are connected in the same way via springs 13 and 14 to two other corners located diagonally opposite one another on the underside 28 of the housing 3. 5 thus arises from the spring arrangement of FIG. 4a described above, by alternately removing four springs on the top 25 and the bottom 26. Since corresponding restoring forces counteract any deflection of the carrier plate regardless of the installation position, the spring arrangement of FIG. 5 has the advantage of using only four springs.
  • the carrier part 2 is clamped in the center of the cuboid housing 3 like a trampoline and is connected to the housing 3 via three tension springs 16, 17, 18, which are arranged in the plane of the carrier plate 2.
  • the tension spring 16 is connected at the corner region formed by the longitudinal sides 22 and 21 of the carrier plate to the inner edge of the housing 3 opposite this corner region.
  • the tension spring 17 is connected at the corner region formed by the longitudinal edges 21 and 24 to an adjacent inner edge of the housing 3.
  • the third tension spring 18 connects the middle part of the longitudinal side 23 opposite the springs 16 and 17 to the center of the housing wall, which lies opposite the inner edges connected to the springs 16 and 17.
  • the vibration-sensitive device is here a CD changer, which is arranged in a cuboid carrier part 2.
  • the carrier part 2 has at least two side walls 6 and 7, which are connected to the housing 3 via spiral spring elements 10 and 11.
  • spiral spring elements 10 and 11 are provided as spiral spring elements 10, 11, the inner turns of which lie in the form of a spiral when the spring is fully compressed, so that the height of the
  • the spring corresponds to the diameter of a single turn.
  • Truncated cone-shaped springs have the advantage of a low overall height.
  • the frustoconical springs can be designed as wire or as band springs.
  • the springs 10 and 11 can be provided as tension or compression springs. In the exemplary embodiment shown in FIG. 4, the springs 10, 11 are designed as tension springs.
  • the springs have two dead turns 30 and 31 at their ends, which do not participate in the suspension.
  • the end turn 30 of the spring 10 is continuously connected to the side wall 7 of the carrier part 2 in a connection area 33 lying flat on the side wall 7.
  • the end turn 31, which has the largest diameter, is continuously connected to the opposite side wall 46 of the housing 3 in a connection area 34.
  • the spring 11 is connected in a corresponding manner to the side wall 6 of the carrier part and the side wall 45 opposite the side wall 46 of the housing 3.
  • the type of connection ensures that circumferential forces, which result from a rotation of the carrier part 2 about the axes of the springs 10, 11 and lead to a torsion of the springs 10, 11, counteract corresponding restoring forces .
  • the tensile force of the spring 10 counteracts the tensile force of the spring 11, so that the carrier part 2 is clamped between the frustoconical springs 10 and 11 approximately in the middle of the free oscillation provided for this purpose. room is located.
  • the spring stiffness of the two springs is so large that the weight of the carrier part 2 with the CD changer only leads to a very small vertical deflection of the carrier part 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Motor Or Generator Frames (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un dispositif à ressort pour le positionnement, dans un boîtier (3), d'un appareil (1) sensible aux vibrations et aux chocs fixé sur un support (2), ce support (2) étant relié au boîtier (3) par l'intermédiaire d'un élément à ressort spiral (10, 13, 14, 15). Il est prévu selon l'invention de monter le support (2) dans le boîtier (3), avec les éléments à ressort spiral (10, 13, 14, 15), de telle façon qu'à chaque composante de force de tension d'un ressort (10, 13, 14, 15) agissant dans un sens déterminée et s'exerçant sur le support (2), s'oppose au moins une composante de force de tension d'un autre ressort (10, 13, 14, 15) agissant en sens opposé, de façon que le support (2) demeure, indépendamment de la position de montage du boîtier (3) dans un véhicule, sensiblement au milieu de l'espace d'oscillation libre prévu. Grâce aux forces de tension de sens opposés des ressorts (10, 13, 14, 15), la rigidité des ressorts et, de ce fait, la fréquence propre de l'ensemble du système peut être avantageusement accrue, ce qui permet d'éviter des zones de résonance indésirables à de faibles fréquences.
PCT/DE1997/001917 1996-09-09 1997-09-02 Dispositif a ressort pour le positionnement, dans un boitier, d'un appareil sensible aux vibrations et aux chocs fixe sur un support WO1998011362A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59703736T DE59703736D1 (de) 1996-09-09 1997-09-02 Federanordnung zur lagerung eines an einem trägerteil befestigten vibrations- oder stossempfindlichen gerätes in einem gehäuse
JP10513128A JP2001500232A (ja) 1996-09-09 1997-09-02 支持部分に固定された振動又は衝撃に敏感な器具をケーシング内で支承するためのばね配置
EP97942771A EP0923684B1 (fr) 1996-09-09 1997-09-02 Dispositif a ressort pour le positionnement, dans un boitier, d'un appareil sensible aux vibrations et aux chocs fixe sur un support
US09/254,444 US6371434B1 (en) 1996-09-09 1997-09-02 Spring arrangement apparatus for mounting a vibration-sensitive or shock-sensitive device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19636496A DE19636496C2 (de) 1996-09-09 1996-09-09 Federanordnung zur Lagerung eines an einem Trägerteil befestigten vibrations- oder stoßempfindlichen Gerätes in einem Gehäuse
DE19636496.5 1996-09-09

Publications (2)

Publication Number Publication Date
WO1998011362A2 true WO1998011362A2 (fr) 1998-03-19
WO1998011362A3 WO1998011362A3 (fr) 1998-08-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001917 WO1998011362A2 (fr) 1996-09-09 1997-09-02 Dispositif a ressort pour le positionnement, dans un boitier, d'un appareil sensible aux vibrations et aux chocs fixe sur un support

Country Status (6)

Country Link
US (1) US6371434B1 (fr)
EP (1) EP0923684B1 (fr)
JP (1) JP2001500232A (fr)
KR (1) KR100471011B1 (fr)
DE (2) DE19636496C2 (fr)
WO (1) WO1998011362A2 (fr)

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CA2894135A1 (fr) * 2014-06-16 2015-12-16 Universiti Putra Malaysia Dispositif d'entretoisement a rigidite variable
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US10888173B2 (en) * 2016-10-28 2021-01-12 Sleep Number Corporation Air controller with vibration isolators
JP7113451B2 (ja) * 2018-06-28 2022-08-05 株式会社ユニロック 防振構造、計測装置
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DE19636496A1 (de) 1998-03-12
US20020053632A1 (en) 2002-05-09
KR100471011B1 (ko) 2005-03-07
DE59703736D1 (de) 2001-07-12
KR20000035976A (ko) 2000-06-26
WO1998011362A3 (fr) 1998-08-06
DE19636496C2 (de) 2000-11-30
EP0923684B1 (fr) 2001-06-06
US6371434B1 (en) 2002-04-16
JP2001500232A (ja) 2001-01-09
EP0923684A2 (fr) 1999-06-23

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